Messages in this thread Patch in this message |  | | Date | Wed, 8 Dec 2021 15:22:58 +0000 | Subject | [PATCH 5/6] KVM: arm64: pkvm: Stub io map functions | From | Quentin Perret <> |
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Now that GICv2 is disabled in nVHE protected mode there should be no other reason for the host to use create_hyp_io_mappings() or kvm_phys_addr_ioremap(). Add sanity checks to make sure that assumption remains true looking forward.
Signed-off-by: Quentin Perret <qperret@google.com> --- arch/arm64/kvm/mmu.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 326cdfec74a1..605c104eb030 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -407,6 +407,9 @@ int create_hyp_io_mappings(phys_addr_t phys_addr, size_t size, unsigned long addr; int ret; + if (is_protected_kvm_enabled()) + return -EPERM; + *kaddr = ioremap(phys_addr, size); if (!*kaddr) return -ENOMEM; @@ -650,6 +653,9 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa, KVM_PGTABLE_PROT_R | (writable ? KVM_PGTABLE_PROT_W : 0); + if (is_protected_kvm_enabled()) + return -EPERM; + size += offset_in_page(guest_ipa); guest_ipa &= PAGE_MASK; -- 2.34.1.400.ga245620fadb-goog
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